DE302396C - - Google Patents
Info
- Publication number
- DE302396C DE302396C DENDAT302396D DE302396DA DE302396C DE 302396 C DE302396 C DE 302396C DE NDAT302396 D DENDAT302396 D DE NDAT302396D DE 302396D A DE302396D A DE 302396DA DE 302396 C DE302396 C DE 302396C
- Authority
- DE
- Germany
- Prior art keywords
- wedge
- lever
- sleeve
- stamp
- under
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000000034 method Methods 0.000 claims description 6
- 241001417534 Lutjanidae Species 0.000 claims 1
- 241000182341 Cubitermes group Species 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D15/00—Props; Chocks, e.g. made of flexible containers filled with backfilling material
- E21D15/60—Devices for withdrawing props or chocks
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D15/00—Props; Chocks, e.g. made of flexible containers filled with backfilling material
- E21D15/14—Telescopic props
- E21D15/16—Telescopic props with parts held together by positive means, with or without relative sliding movement when the prop is subject to excessive pressure
- E21D15/24—Telescopic props with parts held together by positive means, with or without relative sliding movement when the prop is subject to excessive pressure with axial screw-and-nut, rack-and-worm, or like mechanism
- E21D15/26—Telescopic props with parts held together by positive means, with or without relative sliding movement when the prop is subject to excessive pressure with axial screw-and-nut, rack-and-worm, or like mechanism with screw, worm, or the like, not self-locking but normally prevented from rotation by friction members which slip upon excessive pressure
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D15/00—Props; Chocks, e.g. made of flexible containers filled with backfilling material
- E21D15/14—Telescopic props
- E21D15/28—Telescopic props with parts held relatively to each other by friction or gripping
- E21D15/43—Details of wedges
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
Publications (1)
Publication Number | Publication Date |
---|---|
DE302396C true DE302396C (fr) |
Family
ID=556204
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DENDAT302396D Active DE302396C (fr) |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE302396C (fr) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE833934C (de) * | 1950-03-28 | 1952-03-13 | Josef Brand | Verfahren zum Strebausbau mit Vollversatz und Vorrichtung zu seiner Durchfuehrung |
DE849545C (de) * | 1950-05-27 | 1952-09-15 | Emmerich Dipl-Ing Rakus | Einrichtung zur Herstellung einer stempelfreien Abbaufront am Kohlenstoss |
-
0
- DE DENDAT302396D patent/DE302396C/de active Active
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE833934C (de) * | 1950-03-28 | 1952-03-13 | Josef Brand | Verfahren zum Strebausbau mit Vollversatz und Vorrichtung zu seiner Durchfuehrung |
DE849545C (de) * | 1950-05-27 | 1952-09-15 | Emmerich Dipl-Ing Rakus | Einrichtung zur Herstellung einer stempelfreien Abbaufront am Kohlenstoss |
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